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3 years ago

How do you solve cos x- sin^2x- 1

1 answer:

6 0

Sin(A + B) = sin(2x + x) = 1/2
sin(3x) = 1/2 
3x = sin^(-1)[1/2] 
3x = pi/6 , 5pi/6 ...etc 
x = pi/18 , 5pi/18 ...etc

hope that helped

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Find: (4x^2y^3 + 2xy^2 – 2y) – (–7x^2y^3 + 6xy^2 – 2y) need help !!!!!!!!!!!!!

Jobisdone [24]

Xy2 * (11xy-4) that's what i came up with

4 0

4 years ago

Read 2 more answers

Use right triangle ABC, with right angle C, as shown to answer the question.

kompoz [17]

The ratios are: sin B = 4/5 , cos B = 3/5 and tan B = 4/3

Step-by-step explanation:

We can see in the diagram that the values of all sides are given. In case of trigonometric ratios, the side in front of angle under consideration is perpendicular and the side adjacent to angle is base.

In the given case, we have to find trigonometric ratios for angle B; So,

Base = a = 3

Perpendicular = b = 4

Hypotenuse = c = 5

Hence,

The ratios will be:

$sin\ B = \frac{perpendicular}{hypotenuse} = \frac{b}{c} =\frac{4}{5}\\cos\ B = \frac{base}{hypotenuse} = \frac{a}{c} =\frac{3}{5}\\tan\ B = \frac{perpendicular}{base} = \frac{b}{a} = \frac{4}{3}$

The ratios are: sin B = 4/5 , cos B = 3/5 and tan B = 4/3

Keywords: Ratios, triangle

Learn more about trigonometric ratios at:

#LearnwithBrainly

8 0

3 years ago

5/6 n=10 show me how to solve it please

Mila [183]

Hey there! :)

Answer:

n = 12.

Step-by-step explanation:

Given:

5/6n = 10

Solve by isolating the variable. Divide both sides by 5/6. (Multiply by the reciprocal)

5/6n · 6/5 = 10 · 6/5

n = 10 · 6/5

n = 12.

4 0

4 years ago

The fish population in a local stream is decreasing at a rate of 3% per year. The original population was 48,000. Write an expon

ElenaW [278]

Answer:

Results are below.

Step-by-step explanation:

Giving the following information:

Decrease rate (d)= 7%

Number of periods (n)= 7 years

Current population (PV)= 48,000

First, to calculate the future value, we need to use the following decrease exponential formula:

FV= PV*[(1+d)^-n]

After 7 years:

FV= 48,000*(1.07^-7)

FV= 29,892

8 0

3 years ago

————HELPPPPPPP———-

lana66690 [7]

Step-by-step explanation:

given,

measures of 3 angles of triangle,

angle 1 = 3x

angle 2 = 2x + 15°

angle 3 = 3x + 5 °

sum of the angles should be 180°

so,

angle 1 + 2 + 3 = 180°

after inserting the values we got,

3x + 2x + 15 + 3x + 5 = 180°

→ 8x + 20 = 180°

→ 8x = 180 - 20 = 160°

→ x = 160/8 = 2

→ x = 20

therefore,

angle

1 = 3x = 3 × 20 = 60

2 = 2x + 15 = 2(20) + 15 = 55°

3 = 3x + 5 = 3(20) + 5 = 65°

as given,

their sum should be 180° so,

60 + 55 + 65 = 180°

hope this answer helps you dear....

I guess dear the measure of the angles of traingle have x in their expression!...if they have than this is the answer!

8 0

3 years ago